These are the errors I can find on the logs when I try to change the limit.
[25-Mar-2022 05:18:31] NOTICE: Reloading in progress ...
[25-Mar-2022 05:18:31] NOTICE: reloading: execvp("/www/server/php/74/sbin/php-fpm", {"/www/server/php/74/sbin/php-fpm", "--daemonize", "--fpm-config", "/www/server/php/74/etc/php-fpm.conf", "--pid", "/www/server/php/74/var/run/php-fpm.pid"})
[25-Mar-2022 05:18:31] NOTICE: using inherited socket fd=7, "/tmp/php-cgi-74.sock"
[25-Mar-2022 05:18:31] NOTICE: using inherited socket fd=7, "/tmp/php-cgi-74.sock"
[25-Mar-2022 05:18:31] NOTICE: fpm is running, pid 27122
[25-Mar-2022 05:18:31] NOTICE: ready to handle connections
[25-Mar-2022 05:18:31] ERROR: Another FPM instance seems to already listen on /tmp/php-cgi-74.sock
[25-Mar-2022 05:18:31] ERROR: FPM initialization failed
[25-Mar-2022 05:18:41] NOTICE: Reloading in progress ...
[25-Mar-2022 05:18:41] NOTICE: reloading: execvp("/www/server/php/74/sbin/php-fpm", {"/www/server/php/74/sbin/php-fpm", "--daemonize", "--fpm-config", "/www/server/php/74/etc/php-fpm.conf", "--pid", "/www/server/php/74/var/run/php-fpm.pid"})
[25-Mar-2022 05:18:41] NOTICE: using inherited socket fd=7, "/tmp/php-cgi-74.sock"
[25-Mar-2022 05:18:41] NOTICE: using inherited socket fd=7, "/tmp/php-cgi-74.sock"
[25-Mar-2022 05:18:41] NOTICE: fpm is running, pid 27342
[25-Mar-2022 05:18:41] NOTICE: ready to handle connections
[25-Mar-2022 05:18:41] ERROR: Another FPM instance seems to already listen on /tmp/php-cgi-74.sock
[25-Mar-2022 05:18:41] ERROR: FPM initialization failed